21454762813836 has 96 divisors (see below), whose sum is σ = 57281491878912. Its totient is φ = 6191138557440.

The previous prime is 21454762813831. The next prime is 21454762813849. The reversal of 21454762813836 is 63831826745412.

It is a self number, because there is not a number n which added to its sum of digits gives 21454762813836.

It is not an unprimeable number, because it can be changed into a prime (21454762813831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46503081 + ... + 46962176.

It is an arithmetic number, because the mean of its divisors is an integer number (596682207072).

Almost surely, 2^{21454762813836} is an apocalyptic number.

It is an amenable number.

21454762813836 is an abundant number, since it is smaller than the sum of its proper divisors (35826729065076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21454762813836 is a wasteful number, since it uses less digits than its factorization.

21454762813836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93465359 (or 93465357 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 60.

The spelling of 21454762813836 in words is "twenty-one trillion, four hundred fifty-four billion, seven hundred sixty-two million, eight hundred thirteen thousand, eight hundred thirty-six".